Year	current US$
1990	4134735533.69674
1991	6272167344.7622
1992	7621993671.73889
1993	7206181122.0746
1994	5300310079.24256
1995	5506848374.87276
1996	3660456383.53082
1997	5415774329.29992
1998	8880196160.36254
1999	7580290232.76977
2000	7065687371.78665
2001	9551812978.79836
2002	7041831493.56782
2003	5333903015.75205
2004	5210486358.00983
2005	4529895958.26142
2006	6832102837.90862
2007	10427955930.5024
2008	10987455514.6067
2009	8820435250.91929
2010	13160797681.6888
2011	7826338220.5997
2012	4278015296.92354
2013	8155863849.85017
2014	5310654265.07341
2015	9078435517.52507
2016	8683331639.88672
2017	136507126.173023
2018	6612766977.07193
2019	16255837417.8443
2020	13278280932.4855
2021	-4424324891.34841